Friction-top can.



L G. 'KRUM'MEL. 'FRIGTION To? CAN.

APPLIOATION FILED AUG. 31 1912.

Allorneys' Patented Jan. 13, 1914.

IIIIIIIIIIII Q a M 1 3 no 1 r To all whom it may concern:

LoUIs'orrARrEs 'KRU M L, or CLINTON, oonnne rrenr.

Be: it known that 1, Louis C. KnUMiin a citizen of. the United States,residing at Clinton, in the county of Middlesex, State of Connecticut,have invented certain new and useful Improvements in Friction-Top Cans,of which the following is a description, reference being had to theaccompanyingdrawing and 'to thefigures of reference marked thereon. I

The invention relates to new and useful improvements in sheet metal'cans, and more especially to what is known in the tradeas friction topcans.

1 An object of the invention is to provide a can ofthe above typewherein the cover is held in place on the can top partly by friction andpartly by bending the cover fiange'dnringthe seating of the cover. I

A further object of the invention is to provide a can of the above typewherein the cover is held in place by a verticalfriction wall on thecover engaging a friction wall on the can top, and wherein said cover isalso formed-with an outer downwardly projecting flange which is grippedby friction seating walls formed in the can top, which walls are sospaced as to bend the cover flange to aid in holding the cover seated.

These and other objects will in part be obvious and will in part behereinafter more fully disclosed. y

In the drawings, which show by way of illustration the invention, Figure1 is aside View of a friction top can, partly in vertical section,having my improvements applied thereto; Fig. 2 is an enlarged detailshowing in vertical section a portion of the cover,

thecan top, and a portion of the body of the can, the cover beingseated'on the can top Fig. 3 is a new similar toF g. 2, showing thecoverbefore it is forced onto the can top. Fig.4; isa View similar toFig. 2,

showing a modified form of' the-invention. Fig. 5 is a S1m1l3IfV18WSh0W1I1g afurther Y modification,

In carrying "out my invention I hav sproride'd a metal can which conssts ofv the usual-"ca n. body, towhich s, attached an aper:

hired t n OP- h apes u dcan top :is; formed with a curled, or,,rolledpgnt on at;

' its inner edge, which forms-ani ner seat for the cover" and alSQfiPMBSseatingwalls which are located-hen... inner friction se t and the onteredge'ofthe cantop}. The .co'veriisi-formediwithra vltl-l Specificationof LettersPateiit. j Application filed August 31,1912. Serial No. 71s,125. i

. 'rnrcrroiv-j'roificanf- Patented an. 13, 1914.

-- cal friction wall adapted to engage the inner'friction wall'on thecan top, andalso a downwardly projecting-flange adapted to be gripped bythe 'spaced'friction seating walls on the can top. Thesev spaced seatingwalls are curved so as to. give a slight bend to the flangeon the coverwhen saidcover is forced onto the can top for closing the can.

Referring more in'detail to the drawing, my improved friction top. canconsists of a can body 1, onwhich is mounted at the. up-

per edge a can top 2. This can top may beformed with an outer flangewhich is soldered to the can body, or with a flange which is rolledintoa double seam with a corresponding flange on the can body. Eitherform of securing the can top to the can body may be used, or othermethods may be employed. The particular manner of securing the can topto the body of the can has nothing'to do with my invention. This can topis formed with a circular aperture. Said can top is also formed with adownwardly projecting vertical wall 3-, which is provided with a curl orroll 4 at its lower edge. This curl,-as shown in the drawings,'ispreferably an open or loose curlwhich forms a pocket in which may beplaced a plastic sealing substance 5, if desired. The curling of theloweredge forms an annular seating wall 6. 'The edge is further curledso as to form a second curved friction wall 7, which is spaced from thecurved friction wall 8 formed on the inner. face of the flange 3 at thepoint where the curled edge of the flange begins. The cover 9 is formedwitha circular depression which provides a vertical friction wall 10.This verticalfriction wall 10 is adapted to engage the inner annularfriction seat 6 on the :can top. The outer edge of the cover is bentbackward asat 11 t0 form-a prying olf rib, and thence downward to form2. depending flange 12. This depending flange 12 is so'proporti onedthat theouter face thereof engages the inner face "of the flange 3, andthe lower edge of the the spaced friction walls 7 and 8,1it' willfbefirmly gripped thereby. At.'the.tin e, .o r before said flange 12is-g'ripped by the s friction walls 7 -and 8," the; vertical fr ctionneed,

' walllO on the cover is reinforced, or-held in place by the material ofthe coverat the bottom of the depression in the cover. That ,is to say,the vertical Wall at one side of the cover, through the connectingmetal, re

inforces and braces the'vertical wall'10 at the other side of the cover.Therefore. the yertical wall 10. is practically unyielding As this wallis forcedinto the apertured top, the curled or rolled edge of the topwill be firmly'held in place, and any tendency on the part of the flange1.2.to unroll the curl or unduly separate the walls 7 and 8 will beprevented by this backing up, or reinforcing the curl-ed edge by thefriction'wall 10 on the cover. Therefore, when the cover is seated inthe can top, the flange 12 will be firmly, grippedby' the friction walls7 and 8, and the friction walls 6 and-1O forming the inner friction seatfor the cover will further assist in holding the cover seated. In orderto further. aid in holding the cover on the can body portioned thattheflange 12 will be carried down between the friction walls 7 and '8 alongthe curved portions thereof, to a certain extent. These curved wallsforming the friction seats 7 and 8,:will bend the extreme outer edge ofthe flange 12, and this bending of the flange surface is afurther and anad ditional lock for holding the cover. seated. lVhen the curled portionof the can top is provided with a sealing material, the flange 12 willengage said sealing material and substantially .embed therein, whichwill form an effectual seal at the points of contact between the flange12 and the friction walls 7 and 8. It is obvious that fromcertairraspeots of the invention, this'sealing material may be omitted.Furthermore, it will be apparent that in my improved friction top I havea point of sealing where the friction wall 10 on the cover engages thefriction seat 6 on the curled part of the can top. I also have twoadditional points of sealing where the flange 12 engages respectivelythe walls 7 and 8.

It will be obvious that when my improved can is used for packingmaterials containing gummy substances, that said substance will lodge atsome one of the three sealing points and thus aid in the efficientclosing or sealing of the can.

The can top is wall of the can body so as to form a recess 13. The outeredge of the cover, when seated, overhangs. said recess and the coverispreferably .so proportioned that the extreme outer face ofthe cover,when seated, 1s flush with the outer edge of the can. By thisproportioning of the parts the can cover can be forced into its seat andthe edge of the can body will serveas a limiting means to .edgeof theflange of the cover. therefore, be understood that I donot limit theparts are so pro-.

depressed adjacent the be inserted underneath the flange on cover.

for prying the sameoff from the can body. \Vhile I have described theparts as so proportioned as to bend the flange of thecover to assist inlocking the cover to the canbody, it will be obvious that from certainaspects of the invention the flange 0n the cover may be shortened so asto be firmly gripped by the spaced friction walls 7 and 8 without anyresulting bend in the extreme It will myself to a construction wherein aflange is necessarily bent during the seating of the cover. It is alsoto be noted that'while the lower edge oI'the flange 12 is frictionallyclampedbetween the friction walls/7 and 8,

-' the vertical walls of'the flange 12 also frictionally engage thevertical portion of the flange 3,-s0 that, in effect, I have at thispart.

of the' cover a vertical friction seating surface, which terminates intliespaced friction seating surfaces 7vand S.

In Fig. 4, I have shown a slightly modified form of construction, inthat the cover is not providedwith a circular depressed portion. Theconstruction in this figure is otherwise in all respects the same asthat shog'ign and described in connection with Figs. 1 to 3. Inthismodified construction the cover is .held on the can top solely through africtional engagement of the vertical wall on the flange 12 with thefrictional wall on the face of the flange 3, and the gripping frictionbetween the walls 7 and S as they engage the. lower edge of the flange12. As to the construction shown in this figure, the flange may also besufficiently long so that when the cover is seated, it, will be slightlybent by the curved surfaces forming the friction walls 7 and 8, asclearly shown in the drawings, or said wall maybe terminated so that thelower edge thereof will be frictionally gripped by the 'walls 7 and 8without any bending of the flange.

In Fig. 5 I have-shown the central depression as carried down farther sothat the friction wall 10 engages'the friction wall 6 before theprojecting flange 12 is gripped by the friction walls 7 and 8. In thisfigure the cover.- is also cupped centrally,

It is obvious that minor changes in the details of construction and thearrangement of parts may be made without departing from the spirit ofthe invention, as set forth in theappended claims.

at its lower edge inwardly, upwardly and backwardly toward itself toform spaced curved friction walls, and a cover having a downwardlyprojecting vertical flange adapted to have extended vertical frictionalengagement between its outer wall and the flange on the can top andadapted to have the lower free edge thereof seated between and engagingthe spaced'friction walls on the'can top.

2; -A friction top can comprising an apertured top having a verticalflange curled at its lower edge inwardly, upwardly and backwardly towardits-elf to form spaced curved friction walls, a cover having adownwardly projecting vertical flange adapted to have extended verticalfrictional engagement between its outer wall and the flange on the cantop and adapted to have the lower free edge thereof seated between andengaging the spaced fr rtltai walls on the can top, and a sealingmaterial in said curled edge of the can top in which the downwardlyprojecting flange of the cover may be seated.

3. A friction top can coinprisingan apertured top having a verticalflange curledat its lower edge inwardly, upwardly and backwardly towarditself to form spaced curved friction walls, a cover having a downwardlyprojecting vertical flange adapted to have extended verticalfrictionalengagement between its outer wall ,and the flange on the can top andadapted to have the lower free edge thereof seated between and engagingthe spaced friction walls on the can top; and a sealing material in saidcurled edge of the can top in which the downwardly projecting flange ofthe cover may be seated, said cover having at the upper portion of. theflange an outwardly projecting prying off r1b. y

4:; A friction top can comprising an apertured top, having a-verticalflange, curled at its lower edge to form'spaced curved friction wallsand a cover having a single downfree edge adapted to seat between saidwalls and frictionally engage each wall, said cover also having acircular depression forming a vertical friction wall, adapted to engagethe inner face of said curled edge the engaging and gripping surfacesbetween the vertical walls and the curled edge being arranged insubstantially a horizontal line.

5. -A friction top can comprising an apertured top, having a verticalflange. curled at wardly projecting flange having its lower itsloweredge to form spaced curved frictioii walls and a cover having adownwardly pro ecting flange adapted to seat between said walls andfrictionally engage each wall,

"said cover also having a circular depression forming. a verticalfriction wall, adapted to engage the inner face of said curled edge,said cover flange, when seated, projecting into the curved portions ofthe spaced. friction walls and partaking of the curvature thereof.

6. A friction top can comprising an apertured top, having a verticalflange, curled at its lower edge to form spaced curved friction wallsand a cover having a downwardly projecting flange adapted to seatbetween said walls and frictionally engage each wall, said cover alsohaving a circular depression forming a vertical friction wall, adaptedto engage the inner face of said curled edge, said cover flange, whenseated, projecting into the curved portions of the spaced friction wallsand partaking of the curvature thereof, said curled portion of the cantop having a plastic sealing material therein. in which the flange ofthe cover is adapted to be embedded.

In testimony whereof, I allix my signature, in the presence oftwowitnesses.

LOUIS CHARLES KRUMMEL.

Witnesses: r

CHAs. A. 'Posr,

S. BURDETTE REED.

